import {ref,onMounted,computed} from 'vue'

export default function(){
    let sum = ref(0)
    let bigSum  = computed(()=>{
        return sum.value * 10
    })
    

    function add(){
        sum.value += 1
    }

    // 钩子
    onMounted(()=>{
        add()
    })

    return {sum , add,bigSum}
}
